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Reznor UDX 150,000 BTU Natural Gas Unit Heater

Customer reviews

Rating:

4.9 out of 5

4.9 out of 5 View All 57 Reviews Add Your Review

Out of stock

Reznor

Out of stock

Model

UDX-150

55755

1 Question Answered

Description

DISCONTINUED

The Reznor UDX-150 has been discontinued in favor of the UDXC-150.

Reznor model UDX gas-fired unit heaters are great for space heating applications. These units are power vented to eliminate heat losses up the flue pipe. Each heater features a two-tone black and white powder coated, scratch-resistant paint scheme and has clean rounded corners and edges with no visible screws or fasteners. For air circulation, the UDX series utilize an axial propellor fan.

Included

Reznor UDX 150,000 BTU Natural Gas Unit Heater; Model UDX-150

Standard Features

83% AFUE Efficiency
TCORE2 Titanium-Stabilized Aluminized Steel Heat Exchanger
Multi-Try Direct Spark Ignition with Time Lockout
Low Noise Operation with Vibration-Isolated Fan and Venter Motors
Status-Indicating LED Light
7-Segment Display Board for Simple Troubleshooting
Optional Integrated Downturn Nozzle and Integrated Vertical Louvers
2- and 4-Point Suspension Options
External Gas Connection for Ease of Maintenance and Installation
Includes 3 Horizontal Louvers
ETL Approved

Product Note

Reznor UDAP is the legacy model of the Reznor UDX

Product Specs

More Information
Reznor UDX 150,000 BTU Natural Gas Unit Heater
Feature	Spec
SKU	UDX-150
Weight (in lbs)	206
Brand/Manufacturer	Reznor
Replaces	UDX-150
UPC	663132524884
Additional Information	Air Throw: 73 Feet
Furnace Efficiency / AFUE	80-85%
Heating BTU	150,000 BTU
Maximum CFM	1921
Decibel Level (dBA)	51dB at 15ft
Flue Outlet	5"
Watt	392 Watts
Efficiency	83%
Electrical	115 Volt 1 Phase 60 Hertz
Amperage Requirement	3.8 Amps
Connection	1/2" NG/LP Connection to Gas Valve
Fuel Type	Natural Gas
Height	20 1/8"
Width	38 3/16"
Depth	48 7/16"
Warranty	9 Year Heat Exchanger, Burner, and Flue Collection Box Assembly; 4 Year All Electrical and Mechanical Components
Resources	Reznor UDX Installation Guide Reznor UDX Venting Guide Reznor UDX Gas Conversion Guide Reznor UDX Replacement Parts List Reznor UDX Downturn Nozzle Instructions Reznor Unit Heater Catalog Reznor Unit Heater Brochure Reznor Warranty Info You will need AdobeÂ® AcrobatÂ® Reader to view PDF documents.
Safety Information	PROPOSITION 65 WARNING This product and many products on our site may contain a chemical know to the state of California to cause cancer or birth defects or other reproductive harm. For more information about Proposition 65 please Click Here.

Reviews 48

Customers Say

Across multiple BTU sizes from 45,000 to 150,000, owners report fast heat-up times and strong performance in large spaces, including raising a 950 sq ft garage from 35°F to 70°F in 15–20 minutes, heating a 60x40x16 shop from 58°F to 70°F in 35 minutes, maintaining 60°F at -11°F in a 35,000 cubic foot shop, and reliably heating a 46x60 shop with 16 ft ceilings. Installation is frequently described as straightforward—even as a replacement for older Reznor units lasting nearly 20 years—with some noting quieter operation and minor venting adjustments, while isolated issues included an incorrect conversion kit that was promptly corrected and a delivery left outside in the snow.

AI Generated from the text of customer reviews

Top reviews

Reznor UDX 60K

Quality
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The unit was packaged well, and the installation was straightforward. It’s heated my workshop in Northern Michigan for three seasons now, and it’s been flawless.
Review by Reznor
Posted on 3/5/26
UDX200

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Great looking heaters, and performs wells. great service.
Review by Cory
Posted on 2/25/26
Great support easy transaction

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Great support and quality product will buy fromagain
Review by ohio
Posted on 1/21/26
Reznor 60K BTU

Quality
100%

Service
100%

Price
100%

HVAC Direct delivered on time and unit was incredibly packaged for freight. The unit itself is performing quite well in an uninsulated garage. Keeps everything from freezing. I could not be happier with this purchase and my purchase experience. I will definitely purchase from HVAC Direct when its time to heat my 30x40 barn.
Review by Ypsi Jim
Posted on 1/16/26
Outstanding product

Quality
100%

Service
100%

Price
100%

Got a 46x60 shop with 16ft ceilings the reznor 150,000 btu heats it up fast runs quiet totally surprised how this unit performs
Review by Tb
Posted on 1/12/26
Fast delivery, great price, excellent packaging with zero damage. Easy to install.

Quality
100%

Service
100%

Price
100%

Ordered to replace an old UDAP 45. Basically the same but taller. Fit fine as a hanging unit in the garage. Quieter and warmer output than the old one. Pretty much just unhooked the old one, unmounted it and mounted the new one with the same bolts, reattached connections with a slight modification to the venting. Free shipping and it still got here in less than a week. Overall, great experience with HVACDirect and the price was the lowest I could find.
Review by Dan
Posted on 12/22/25
Great heater

Quality
100%

Service
100%

Price
100%

Easy installation, quiet and works very well!
Review by Corey
Posted on 11/5/25
Great purchase

Quality
100%

Service
100%

Price
100%

We just installed this unit today and it heated my shop up from 58degs. To 70degs. In 35 minutes. The shop is 60x40x16 high.
Review by Nimrod
Posted on 10/23/25

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Why Choose Reznor Unit Heaters?

Reznor unit heaters are engineered for powerful, energy-efficient heating in commercial, industrial, and residential spaces. With durable construction and advanced technology, these heaters deliver reliable warmth, even heat distribution, and flexible installation options—making them ideal for warehouses, garages, workshops, and more.